Mechanical digger



M, L HELLER. MECHANICAL-519G653. APPLICATION FILED we. 11, 1919.

Pat emed Jan. 25, .1921

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M. L. MILLER. MECHANICAL BIGGER. APPLICATION HLED AUGJI, 1919.

Patented Jan, 25, 1921.

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Patented Jan. 25, 1921.

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M. L. MILLER.

MECHANICAL BIGGER. APPLICATION FILED AUG.II, I919.

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ATENT oFFICE.

MARINUS LESLIE MILLER, 01E SOUPABAYA, JAVA.

MECHANICAL BIGGER.

Specification of Letters Patent.

7 Patented "912111.25, 1921.

Application filed'August 11, 1919. Serial No. 316,909.

T 0 all whom it may concern:

Be it known that I, Mamwns Lnsmn MILLER, a subject of the King of GreatBritain, residing in Sourabaya, Java, have invented certain new anduseful Improve ments in Mechanical Diggers of which the following is aspecification.

This invention relates to mechanical diggers and it has for its objectcertain improvements in such diggers designed to secure their moreefficient operation.

The invention further provides an improved form of spade for use inmechanical diggers, and means for emptying or clearing the earth fromsaid spades.

In order that the invention may be the hotter understood d *awings areappended in which Figure 1 is a side view of a digger embodying thepresent improvements.

Fig. 2 is a plan.

Fig. 3 is a side view of one of the spades showing the arrangement ofthe clearing mechanism.

Fig. 4% is a plan showing two spades respectively at the end of theirrear and forward strokes.

Fig. 5 is an end view of the spade shown in Fig. 3.

Fig. 6 is a side view of a spade with the operating mechanism therefor.

Fig. 7 is a View showing diagrammatically one complete cycle ofmovement;

In the accompanying drawings the inven tion is shown as applied to amotor driven machine, and in which drawings while the whole machine isillustrated only such parts thereof as are essential to the properunderstanding of the invention are identified and will be described.

Referring to'the drawings 1 indicates the frame of the machine formed ofchannel iron, tapering somewhat toward the front of the said machine,said frame being sup-' ported by means of driving wheels 2 and asteeringwheel 3 locate d in the front of the machine. The machine is driven bymeans of a motor indicated generally by 1, mounted in any convenientmanner upon the frame 1, a

suitable gear box being provided 5 to the main shaft e of which themotor is coupled.

7 indicates a shaft which may if desired be coupled directly to theengine shaft and 8 indicates a second shaft connected to shaft 6, thegearing in box 5 being so arranged that only'one of the shafts 7 and 8can be driven at the same time. 9 indicates a differential gear ope'ated by bevel wheels, 10, 11, respectively secured to shaft 7 and tothe shaft 12, operatedthrough the differential gear, the shaft 12serving to give backward or forward motion to the driving wheels 2.

Disposed at the bacl: of the machine and supported by the frame 1 of themachine is the digging mechanism comprising eight arms 13 pivotallymounted at their lower ends upon the main. shaft 1% supported by theframe of the machine;

As will. be seen on reference to Fig. 2 three of the arms 13 upon eachside of the machine are connected at their upper ends by means of a rod1 the two center arms 13 being connected by a rod 13". Pivotallyconnected to the upper ends of the center of the three arms upon eachside of the ma- 1 chine are bars 15 formed of channel iron. A

similar bar 15 is provided for the arms in the center of the machine.The bars-at their inner ends are secured together and have attached tothem a nut 16 engaging a screw.

17 mounted in a suitable frame and operable by means of a hand wheel 18.By this means the arms may be swung in either one or other direct-ion toadvance or withdraw the digging mechanism.

The main shaft lat before referred to is driven by means of the bevelpinion 19 engaging the smaller pinion 20 which latter is keyed to shaft8. Secured to shaft 1 1 are two pinions 21, 22, en aging the toothed,wheels 23, 24, formed in two parts secured to a 6 throw crank shaft 25supported by bearings formed in the aforesaid arms 13.

Also secured to the shaft 25 are chain wheels 26, 2?, made in two partssccuredtogether in any convenient manner. The chain wheeis drive otherchain wheels 29. formed in one piece with or secured to other chainwheels 30, 31, whereby power is trans mitted from wheels 26, 27, toshaft 12 11 30.11 which are mounted free chain wheels 3%. Thus whensiiaft 12 is ingear with shaft 7 the chain wheels 33. 3st, remainstationary.

Freely mounted upon shaft lei carrying the aforesaid. arms 13 areotherarnis 35 the i right and the other left hand, each spade upon thedischarge side having upon the underside a web 38 while'upon the otheredge a web 39 is provided upon the upper surface of the plate.

The spade at theupper end is provided with 'a plate 4:0 shaped as shown,and pivotally connected at 41 to a plate 42 at the upper end of theblade of the spade. 43 indicates a rod pivotallyconnected at its outerend to the plate 40 and at its opposite end connected to a collar L4sliding freely upon the rod 45 supported at its end in bracket-s 46, 46,'secured to the rod or shaft 36 of the spade. 47 indicates a springconnected at one end to the plate 40 and at the otherto an arm upon thebracket 46 and by means of which springas will be hereinafter more fullyexplained the plate 40 is returned to its brought into or normalposition after being operated to clear the earth from the spade.

Sliding freely upon rod is a slipper L8 to which is connected the outerend of a rod as which rod at its inner end is provided with strap 50surrounding a grooved collar 51' secured to the crank shaft 25.

13 indicates an extension of the arm 13 at the lower end of which is'revolubly mounted a disk 53 adapted to contact with the ground and sostart the trench.

The action of the parts just above de-' scribed is as follows 2+Assuming a spade to be in its lowest position, as the crank acts toraise the spade the sliding collar 44: to which plate 40 is connectedcomes into contact with the slipper 48 connected to rod 49 whereby theplate 40 is caused to sweep across the spade being at the end of the upstroke in the position shown to the left of Fig. 4c the earth beingdischarged upon the right hand side of the spade the plate 40 beingretained at the side of the spade by means of the spring f.

:Thepath of the spade during one complete rotation of the crank shaft isshown in Fig. 4 the distance between the horizontal lines a; showing thedepth of the trench.

laims.

1. In a digging machine a plurality of crank actuated, spades, means forclearing the earth therefrom mounted .upon said spades said clearingmeans being caused to sweep across the spades during the upward movementthereof and to project the earth to one side means for propelling themachine and-operating the spades and means whereby the spade V mechanismmay be thrown out of epcration.

2. In a digging machine a plurality of crank actuated spades, platespivotally mounted upon said spades, means for operating saidplateswhereby they are caused to sweep. across the upper surface thereofduring the upward movement thereof and to .project the earth to oneside,-means for pr0- rods pivotally mounted upon acey 1 pelling themachine and operating the spades, and means whereby the spade mechanismmay be brought into or thrown out of operation.

3. In a digging machine a plurality of spades, a crank shaft having aplurality of cranks to which the spade shafts are connected, guide barsmounted upon the spade shafts, slippers upon said guide bars, rodsconnected at one end to the crank shaft and at the other to theslippers, bosses slidablc on the guide bars, plates pivotally mountedupon the blades, springs operating to move the plates in one direction,rods connecting the plates with the bosses, means for propelling themachine and operating the spade mechanism and means whereby the spademechanism may be brought into or thrown out of operation.

a. In a digging machine a plurality of spades, a crank having aplurality of cranks to which the spade shafts are connected, guide barsmounted upon said spade shafts, slippers uponsaid guide bars, rodspivotally connected at one end to the crank shaft and at the other tothe slippers, bosses slidable on the guide bars, plates pivotallymounted upon the upper ends of the'blades, springs operating to move theplates in one direction, rods connecting thev plates ,with the bosseswhereby the plates are operated against the action of the spring,linkscontrolling the radial movement of the spades, means for propellingthe machine and 'opcrating the spades, and means whereby the spademechanism may be brought into or thrown out of operation. i

5. In a digging machine a shaft, brackets pivotally supported on saidshaft, a crank shaft supported in said brackets having a plurality ofcranks, a plurality of spades to which the crank shafts are connected,guide bars carried by supports mounted on the spade shafts, slippersupon said guide bars, said crank shaft at one end and at the otherconnected to the slippers, bosses slidable on the guide bars, angleplates pivotally mounted at the upper 'endsof the blades ofYthe spades,springs connected at one end to one of the supports of the guide barsand at the other to said angle plates a screw operated body, linksconnected at one end to said body and at the other to the swingingbrackets carrying the crank shaft, means for operating saidscrew to rocksaid swinging members, J means for propelling the machine and operatingthe spades, and meanswhereby the spade mechanism may be brought into orthrown outof operation.

6. In a digging machine a shaft, pinions thereon, brackets swinginglymounted on said shaft, a crank shaft carried by said. swinging brackets,pinions on said crank shaft engaging the pinions on the driving shaft,chain wheels on said crank shaft, other chain wheels on the drivingshaft,

' chains passing around said chain wheels,

Cll

other chain wheels connected to said latter wheels and clutched to thesaid driving shaft, a shaft operating the driving wheels of the machine,chain wheels clutched to said shaft, a chain whereby motion istransmitted from the chain wheels clutched to the driving shaft, amotor, a gear box, a shaft driven through the said gear, a second shaftalso capable of being driven by said gear, means for driving eithershaft at will, a bevel wheel upon the first shaft a bevel wheel engagedby said first bevel wheel upon the driving shaft, a bevel wheel upon thesecond shaft, a bevel wheel engaged thereby upon the shaft operating thedriving wheels, spades operated by the crank shaft, and spade clearingmeans upon said spades.

'7. In a digging machine a shaft, pinions thereon, brackets swinginglymounted on said shaft, a crank shaft carried by said swinging brackets,pinions on said crank shaft engaging the pinions on the driving shaft,chain wheels on said crank shaft, other chain wheels on the drivingshaft, chains passing around said chain wheels, other chain wheelsconnected to said latter wheels and clutched to the said driving shaft,a shaft operating the driving wheels of the machine, chain wheelsclutched to said shaft, a chain whereby motion is transmitted from thechain wheels clutched to the driving shaft, a motor, a gear box, a shaftdriven through said gear, a second shaft also capable of being driven bysaid gear, means for driving either shaft at will, a bevel wheel uponthe first shaft, a bevel wheel engaged by said first bevel wheel uponthe driving shaft, a bevel wheel upon the second shaft, a bevel wheelengaged thereby upon the shaft operating the driving wheels, spadesoperated by the crank shaft, plates pivotally mounted upon said spadesadapted to sweep across the upper surface thereof and to project theearth to one side.

8. In a digging machine a shaft, pinions thereon, brackets swinginglymounted on said shaft, a crank shaft carried by said swinging brackets,pinions on said crank shaft engaging the pinions on the driving shaft,chain wheels on-said crank shaft, other chain wheels on the drivingshaft, chains passing around said chain wheels, other chain wheelsconnected to said latter wheels and clutched to the said driving shaft,a shaft operating the driving wheels of the machine, chain wheelsclutched to said shaft, a chain whereby motion is transmitted from thechain wheels clutched to the driving shaft, a motor, a gear box, a shaftdriven through the said gear, a second shaft also capable of beingdriven by said gear means for driving either shaft at will, a bevelwheel upon the first shaft, a bevel wheel engaged by said first bevelwheel upon the driving shaft, a bevel wheel upon'the second shaft, abevel wheel engaged thereby upon the shaft operating the driving wheels,spade shaft connected to the cranks of the crank shaft, guide barsmounted upon the spade shafts, slippers upon said guide bars, rodsconnected at one end to the crank shaft and at the other to theslippers, bosses slidable on the guide bars, plates pivotally mounted.upon the blades, springs operating to move the plates in one directionand rods connecting the plates with bosses.

9. In a diggingmachinc a shaft, pinions thereon, brackets swinginglymounted on said shaft, a crank shaft carried by said swinging brackets,pinions on said crank shaft engaging the pinions on the driving shaft,chain wheels on said crank shaft, other chain wheels on the drivingshaft, chains passing around said chain wheels, other chain wheelsconnected to said latter wheels and clutched to the said driving shaft,a shaft operating the driving wheels of the machine, chain wheelsclutched to said shaft, a chain whereby motion is transmitted from thechain wheels clutched to the driving shaft, a motor, a gear box, a shaftdriven through the said gear, a second shaft also-capable of beingdriven by said gear, means for driving either shaft at will, a bevelwheel upon the first shaft, a bevel wheel engaged by said first bevelwheel upon the driving shaft, a bevel wheel upon the second shaft, abevel wheel engaged thereby upon the shaft operating the driving wheels,spade shafts connected to the cranks of the crank shaft, guidebars-mounted upon said spade shafts, slippers upon said guide bars, rodspivotally connected at one end to the crank shaft and at the other tothe slippers,

bosses slidable on the guide bars, plates pivotally mounted upon theupper ends of the blades, springs operating to move the plates in onedirection, rods connecting the plates with the bosses whereby when theslippers contact with the bosses the plates are operated against theaction of the springs, links controlling the radial movement of thespades and means for propelling the machine and operating the spades.

In testimony whereof I affix my signature in the presence of twowitnesses,

M. LESLIE MILLER.

Witnesses B. U. POWELL, D. Lnsmn MILLER.

